/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package org.apache.ambari.server.state.fsm;

/**
 * Exception thrown when a StateMachine encounters an invalid
 * event at its current state.
 */
@SuppressWarnings("serial")
public class InvalidStateTransitionException extends Exception {

  private Enum<?> currentState;
  private Enum<?> event;

  public InvalidStateTransitionException(Enum<?> currentState, Enum<?> event) {
    super("Invalid event: " + event + " at " + currentState);
    this.currentState = currentState;
    this.event = event;
  }

  public Enum<?> getCurrentState() {
    return currentState;
  }

  public Enum<?> getEvent() {
    return event;
  }

}
